444 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
ill-defined central group of scarcely larger ones; on the area between 
the two throat folds several rows of large hexagonal scales; under side 
of body with twelve longitudinal and thirty-six transverse rows of 
plates; preanal plates irregular and of varying size, the two median 
ones in a line with the axis of the body, and the two adjacent ones 
largest; on the lower arm one row of very wide, and two of very 
narrow antebrachials breaking up into small scales proximately; 
on the upper arm two or three rows of brachials, very slightly larger 
and grading into the granules of the arm; on the posterior side near 
the elbow a small group of slightly enlarged postbrachials; under 
side of the thighs covered distally with four rows of plates, outer row 
much the largest, breaking up proximally into ten or twelve smaller 
rows; thirty-four and thirty-six femoral pores; on the under side of 
the tibia four rows of plates those of the outer being about double the 
others; upper side of the wrist covered with granules; outer toe 
extending a little further than the inner; tail covered with straight, 
keeled scales; about thirty-three scales in the fifteenth ring from the 
base. : 
Coloration: — Upper and lateral surfaces dark brown tinged with olive 
or with blue, no pattern but nearly uniform dirt-color; head and tail 
more olive; ventral surface dark green, tinged with olive or with blue. 
Variation: — There is apparently no variation in the female. We 
have been able to examine no young individuals, but it is probable 
that they also do not vary. 
Remarks:— The description was made of an adult male that meas- 
ured one hundred and eleven millimeters from snout to vent. 
There is every reason to suppose that this specimen was one of the 
types. Cope when he described Ameiva corvina in 1861 stated that 
the types were in the Academy of natural sciences of Philadelphia 
(collected by Mr. Hanson) and in the Smithsonian institution (col- 
lected by Mr. Riise). Dr. Stejneger writes me that there are no speci- © 
mens of this species in the U. S. N. M. and that there is no evidence 
that there ever were any. The types in the Philadelphia Academy 
collection are nos. 9115 to 9121. The additional specimens which 
Cope examined and which he credited to the Smithsonian collection 
are beyond doubt now in this Museum. One, M. C. Z. 5532, was 
received when the research collection of reptiles was sent to this 
Museum by the Peabody academy of science of Salem. It is marked 
as “a type of A. corvina Cope from Sombrero Island.” It may have 
been given to the Museum in Salem by Cope, or received in exchange 
for the courtesy of permission to study and describe species in the 
Salem collection. The types of Chamaeleo basiliscus Cope and Sepsina 
grammica Cope were among those which Cope described from the 
